Прочитайте текст и заполните пропуски подходящими по смыслу словами Riveting is a 1_______ of joinin...: ответ на тест 800527 - Английский язык

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Riveting is a 1_______ of joining metals 2_______. The process consists of drilling or punching the metal plates, inserting the rivet and then 3_______ it by compression force. There are several standard 4_______ of rivet heads with different uses.

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Riveting is a 1_______ of joining metals 2_______. The process consists of drilling or punching the metal plates, inserting the rivet and then 3_______ it by compression force. There are several standard 4_______ of rivet heads with different uses.

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Heat causes some 1_______ to expand more than others. For example, copper expands more than 2_______. This effect is used in the bimetal strip, which consists of two dissimilar strips of metal 3_______ together. The strips are usually made of brass (an alloy of copper and zinc) and invar, a ferrous alloy which expands very little when heated.
An increase in 4_______ causes the brass to expand more than the invar. This expansion causes the bimetal strip to bend, and consequently a switch or a valve is activated.

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Heat causes liquids to expand. This effect is used in the 1_______. An increase in air temperature 2_______ the liquid to expand in the heat sensor. This expansion causes the valve to close and consequently the 3_______ of hot water is reduced.
After a time, the temperature will go down and the liquid will cool and contract. The spring load will now be greater than the liquid pressure and the valve will open. Once again, the hot water flow 4_______.

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Man has always tried 1_______ his standard of living by changing his surroundings and by making tools to simplify the everyday tasks necessary for his existence. At first, the only 2_______ he could use were those he could see around him – stone, wood and so on. He survived in competition with other animals because of his abilities with his 3_______ and their coordination with his brain. Because he did not have 4_______ and speed of some animals, his survival depended on his skillful use to get food and to keep him warm and safe.

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A variety of housing has been provided in new towns, including two-storey houses, bungalows, flats and maisonettes. The greatest demand is for 1_______ with gardens. Many families moving to the new towns have previously lived in overcrowded conditions in flats or rooms in the centres of cities and want the space and freedom of a house and 2_______ where children can play in safety. In view of this preference, care is taken to provide houses of varied 3_______ types, avoiding monotony and ensuring privacy. Houses may, for example, be built in courts, closes, terraces or other groupings and set various distances from, and angles to, roads. A number of 4_______ such as bricks and cements of different colours and panels of natural timber are also used.